USB Power Switches

USB power switches are power management devices used to charge electronic devices on USB ports and hubs on computers, docking stations, handheld devices and automotive devices. 


How do USB power switches work?

They work by monitoring the current on a device and latch a switch off if the output current is shorted. They often have an auto reset feature which reactivates the switch once the short circuit is removed. They work in the same way as hot swap controllers, which allow circuit boards and electronic cards to be inserted into equipment, removing the need to power down during use.


Features of USB power switches

Most USB power switches have multiple safety features. For instance, built in thermal-overload protection limits junction temperature and dissipation of power. 


The internal circuity is limited to an accurate figure to protect the input supply against short circuit conditions as well as overload. They're also fitted with fault signals that notify the microprocessor whenever there's a current-limit, under voltage lockout (UVLO), short-circuit fault or thermal overload.


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Description Price Switch Type Number of Outputs Switch On Resistance Maximum Power Dissipation Mounting Type Package Type Pin Count Current Limit Dimensions Length Width Height Maximum Input Voltage Maximum Operating Temperature
RS stock no. 864-4743
Mfr. Part No.FSUSB42MUX
R 3.946
Each (On a Reel of 4000)
units
- 1 6.5Ω - Surface Mount MSOP 10 - 3 x 3 x 0.85mm 3mm 3mm 0.85mm - +85 °C
RS stock no. 178-4284
Mfr. Part No.FUSB302BVMPX
R 9.584
Each (On a Reel of 3000)
units
USB 1 - - Surface Mount WQFN 14 - 2.5 x 2.5 x 0.72mm 2.5mm 2.5mm 0.72mm 21 V +105 °C
RS stock no. 186-1507
Mfr. Part No.FUSB307BVMPX
R 25.508
Each (In a Pack of 5)
units
USB - - - Surface Mount WQFN 16 210.5mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 21.5 V +105 °C
RS stock no. 146-4910
Mfr. Part No.AP22804ASN-7
R 2.203
Each (In a Pack of 10)
units
High Side 1 65mΩ - Surface Mount U-DFN2020 5 + Tab 3.3A 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 2.4 V +85 °C
RS stock no. 823-3185
Mfr. Part No.AP2411MP-13
R 5.31
Each (In a Pack of 25)
units
High Side 1 135mΩ Internally Limited Surface Mount MSOP 8 2.85A 3.1 x 3.1 x 0.95mm 3.1mm 3.1mm 0.95mm 5.5 V +85 °C
RS stock no. 921-0492
Mfr. Part No.AP2553AW6-7
R 5.592
Each (In a Pack of 10)
units
High Side 1 135mΩ Internally Limited Surface Mount SOT-26 6 2542mA 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 5.5 V +85 °C
New
RS stock no. 208-8589
Mfr. Part No.LM3526MX-H/NOPB
R 10.022
Each (On a Reel of 2500)
units
High Side 2 140mΩ 700 mW Surface Mount SOIC 8 - - - - - - -
RS stock no. 165-8452
Mfr. Part No.AP2552FDC-7
R 4.619
Each (On a Reel of 3000)
units
Low Side 1 150mΩ Internally Limited Surface Mount U-DFN2020 6 2542mA 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 5.5 V +85 °C
RS stock no. 662-2381
Mfr. Part No.TPS2041BDBVT
R 16.44
Each (In a Pack of 5)
units
High Side, USB Power Distribution 2 95mΩ 285 mW Surface Mount SOT-23 5 1.25A 2.9 x 1.6 x 1.15mm 2.9mm 1.6mm 1.15mm 5.5 V +85 °C
RS stock no. 809-9881
Mfr. Part No.ADP197ACBZ-R7
R 25.016
Each (In a Pack of 5)
units
High Side 1 17mΩ - Surface Mount WLCSP 6 - 1.5 x 1 x 0.38mm 1.5mm 1mm 0.38mm 5.5 V +85 °C
RS stock no. 190-4412
Mfr. Part No.MAX4899AEETE+
R 49.869
Each (In a Tube of 100)
units
High Speed - 18Ω 1.67 W Surface Mount TQFN-EP 16 2mA 3 x 3 x 0.75mm 3mm 3mm 0.75mm 3.6 V +85 °C
RS stock no. 921-0401
Mfr. Part No.AP2145SG-13
R 15.458
Each (In a Pack of 10)
units
Low Side 2 140mΩ Internally Limited Surface Mount SOIC 8 1A 4.95 x 3.95 x 1.5mm 4.95mm 3.95mm 1.5mm 5.5 V +85 °C
RS stock no. 905-4624
Mfr. Part No.1689
R 436.48
Each
units
- - - - Panel Mount - - - 20 (L) x 38 (W)mm 20mm 38mm - - -
RS stock no. 146-4714
Mfr. Part No.AP22811BW5-7
R 1.684
Each (On a Reel of 3000)
units
High Side 1 90mΩ - Surface Mount SOT25 5 3.2A 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 2.4 V +85 °C
RS stock no. 177-0721
Mfr. Part No.MIC2025-1YM
BrandMicrochip
R 14.591
Each (In a Pack of 10)
units
USB High Side Power 1 160mΩ - Surface Mount SOIC 8 0.85A 4.93 x 3.94 x 1.48mm 4.93mm 3.94mm 1.48mm 5.5 V +85 °C
RS stock no. 921-0489
Mfr. Part No.AP2552FDC-7
R 6.366
Each (In a Pack of 10)
units
Low Side 1 150mΩ Internally Limited Surface Mount U-DFN2020 6 2542mA 2.07 x 2.07 x 0.58mm 2.07mm 2.07mm 0.58mm 5.5 V +85 °C
RS stock no. 186-1261
Mfr. Part No.FSA1153UCX
R 6.577
Each (On a Reel of 3000)
units
USB - - Surface Mount WLCSP 12 - 1.605 x 1.44 x 0.42mm 1.61mm 1.44mm 0.42mm 5.5 V +85 °C
New
RS stock no. 205-2422
Mfr. Part No.NCV81599MWTXG
R 17.999
Each (On a Reel of 5000)
units
Adjustable 2 - 4.1 W Surface Mount QFNW-32 32 - - - - - - -
RS stock no. 177-0815
Mfr. Part No.MIC2075-2YMM
BrandMicrochip
R 5.905
Each (In a Pack of 20)
units
USB High Side Power 1 160mΩ - Surface Mount MSOP 8 0.85A 3 x 3 x 0.92mm 3mm 3mm 0.92mm 5.5 V +85 °C
RS stock no. 460-792
Mfr. Part No.LM3526M-L/NOPB
R 26.214
Each (In a Pack of 5)
units
High Side 4 100mΩ 700 mW Surface Mount SOIC 8 2.2A 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm 5.5 V +85 °C